#include <iostream>
#include <vector>
#include "queue.h"
using namespace std;


int main()
{
	ykh::queue<int> q;

	q.push(1);
	q.push(2);
	q.push(3);
	q.push(4);

	while (!q.empty())
	{
		cout << q.front() << " ";
		q.pop();
	}
	cout << endl;

	return 0;
}